>all the atoms in our universe/galaxy/solar system with a mass up to that of iron are formed in the core of stars Note that this is not, strictly speaking, tru

>all the atoms in our universe/galaxy/solar system with a mass up to that of iron are formed in the core of stars Note that this is not, strictly speaking, true. Roughly 90% of the helium atoms in the universe were created via Big Bang nucleosynthesis. https://en.wikipedia.org/wiki/Big_Bang_nucleosynthesis https://en.wikipedia.org/wiki/Big_Bang_nucleosynthesis